[PATCH v2] intel-gpu-tools: fix version.h creation in android

[tim.gore@intel.com]

From: Tim Gore <tim.gore@intel.com>

commit 743dc7997aa9f5210055896940d87c88983dcda6
breaks the build under Android because version.h
is not created. This happens because the android
make executes from the ANDROID_BUILD_TOP directory
rather than from the directory containing the source
files, so we need to differentiate between Android
and linux builds. This is V2 of this patch based on
Thomas Wood's suggestion.

Signed-off-by: Tim Gore <tim.gore@intel.com>
---
 lib/Android.mk       |  3 ++-
 lib/Makefile.am      |  3 +++
 lib/Makefile.sources | 20 +++++++++++---------
 3 files changed, 16 insertions(+), 10 deletions(-)

diff --git a/lib/Android.mk b/lib/Android.mk
index 6f444a0..5739c80 100644
--- a/lib/Android.mk
+++ b/lib/Android.mk
@@ -1,6 +1,7 @@
 LOCAL_PATH := $(call my-dir)
 
 GPU_TOOLS_PATH := $(LOCAL_PATH)/..
+IGT_LIB_PATH := $(LOCAL_PATH)
 
 # FIXME: autogenerate this info #
 $(GPU_TOOLS_PATH)/config.h:
@@ -13,7 +14,7 @@ include $(LOCAL_PATH)/Makefile.sources
 include $(CLEAR_VARS)
 
 LOCAL_GENERATED_SOURCES :=       \
-	$(GPU_TOOLS_PATH)/lib/version.h  \
+	$(IGT_LIB_PATH)/version.h  \
 	$(GPU_TOOLS_PATH)/config.h
 
 LOCAL_C_INCLUDES +=              \
diff --git a/lib/Makefile.am b/lib/Makefile.am
index 4d4efe4..9f6a021 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -1,3 +1,6 @@
+IGT_LIB_PATH := .
+GPU_TOOLS_PATH := ..
+
 include Makefile.sources
 
 noinst_LTLIBRARIES = libintel_tools.la
diff --git a/lib/Makefile.sources b/lib/Makefile.sources
index 2d971c5..96786e0 100644
--- a/lib/Makefile.sources
+++ b/lib/Makefile.sources
@@ -48,12 +48,14 @@ libintel_tools_la_SOURCES = 	\
 	$(NULL)
 
 .PHONY: version.h.tmp
-version.h.tmp:
+
+$(IGT_LIB_PATH)/version.h.tmp:
 	@touch $@
-	@if test -d $(top_srcdir)/.git; then \
-		if which git > /dev/null 2>&1; then git log -n 1 --oneline | \
+	@if test -d $(GPU_TOOLS_PATH)/.git; then \
+		if which git > /dev/null 2>&1; then cd $(@D); \
+			git log -n 1 --oneline | \
 			sed 's/^\([^ ]*\) .*/#define IGT_GIT_SHA1 "g\1"/' \
-			>> $@ ; \
+			>> $(@F) ; \
 		else \
 			echo '#define IGT_GIT_SHA1 "NO-GIT"' >> $@ ; \
 		fi \
@@ -61,12 +63,12 @@ version.h.tmp:
 		echo '#define IGT_GIT_SHA1 "NOT-GIT"' >> $@ ; \
 	fi
 
-version.h: version.h.tmp
-	@if ! cmp -s version.h.tmp version.h; then \
-		echo "updating version.h"; \
-		mv version.h.tmp version.h ;\
+
+$(IGT_LIB_PATH)/version.h: $(IGT_LIB_PATH)/version.h.tmp
+	@if ! cmp -s $(IGT_LIB_PATH)/version.h.tmp $(IGT_LIB_PATH)/version.h; then \
+		mv $(IGT_LIB_PATH)/version.h.tmp $(IGT_LIB_PATH)/version.h ; \
 	else \
-		rm version.h.tmp ;\
+		rm $(IGT_LIB_PATH)/version.h.tmp ; \
 	fi
 
 BUILT_SOURCES = version.h
-- 
1.9.2